Carbureter.



F, 0. BALL.

CARBURETER.

APPLICATION FILED M1630, 1916.

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FREDERICK 0. BALL, OF DETROIT, MICHIGAN, ASSIGNOR, BY DIRECT ANDASSIGNMENTS, TO BALL &. BALL CARBURETOR COMPANY,

GAIN, A CORPORATION OF MICHIGAN.

CARIBURETEE.

013 DETROIT, MICHI- REESSUEQ Fatented Oct. 16, 1917.

Application filed August 30, 1916. Serial No. 117,607.

To all whom it may concern:

Be it known that I, FREDERICK 0. BALL, a

.citizen of the United States, residing at Detroit, in the county of\Vayne and State of Michigan. have invented new and useful Improvementsin (Iarbureters, of which the following is a specification.

This invention relates to carbureters and consists in certainimprovements in the construction thereof as will be hereinafter fullydescribed and pointed out in the claims.

It is desirable to momentarily supplement the normal fuel supplied tothe carbureter as the throttle is opened. Such devices are usuallytermed pick-up devices and this in vention has particular reference tothis feature.

The invention is illustrated in the accompanying drawing wherein avertical section of a carburetor is shown.

1 marks the float chamber, 2 the float, 3 the inlet valve, 4 the inletconnection, 5 the mechanism for communicating the movement of the floatto the valve, 6 the cover and 7 the clip for holding the cover in place.

The float chamber has a projection 8 ex tending under the body of thecarburetor and is secured to the body of the carbureter by a screw 9which extends through the extension 8 and forms a closure for a chamber10. The screw has a reduced portion forming a passage 11 whichcommunicates with the passage 12. A passage 13 extends into the body ofthe carburetor from the passage 11 and communicates with a passage 14leading to the nozzle 15. The nozzle is arranged in the Venturi tube 16forming an initial air opening of the carbureter. The Venturi tube opensinto the mixing chamber 17. An auxiliary air opening 18 is provided.This is controlled by a yielding valve 19 operating on the seat 20. Thevalve is guided by a pin 21 extending from a cap '22. A spring 23yieldingly holds the valve to its seat. A throttle valve 24 is arrangedon the stem 25.

A choke valve 28 is mounted on the stem 29 and controls the air inlet inthe usual manner.

The screw 9 has a radial opening 9 which communicates with the passage11 leading to the axial passage 9. The passage 9 extends upwardly into acylindrical extension 30 extending upwardly from the screw 9. This isconnected by the radial openings 31 municates with with the chamber 10.A needle valve 32 controls the passage 9". It has a stem which extendsupwardly through a passage 34 in a screw 3% on the upper end of theextension 30. A spring 35 is arranged around the stem 33 and operatesagainst the back of a valve 36, the valve 36 controlling the passage 34.The spring, therefore, when released opens the valve 32. The stem 33engages a shoulder 38 carried by a plunger 3!). The plunger 39 operatesin a cylinder 40. The cylinder 40 is connected by a passage 41 with themixing chamber above the throttle 24:. A spring 42 operates against theshoulder 38 and is of sutlicient strength to overcome the spring 35 andclose the valve 32 when the parts are not influenced by the piston orcylinder 39. The passage 3% comthe chamber 37 and this communicatesthrough a passage 43 with the mixing chamber. A passage 44 leads'fromthe upper end of the chamber 10 to the outer air. The operation of thedeviceis as follows: lVhen the throttle is closed and the engine runningthe pressure above the throttle is very much reduced and this beingcommunicated through the passage 31 to the cylinder 40 subjects theupper face of the piston 39 to a much smaller pressure than that belowthe piston. In consequence the piston 39 is drawn upwardly coi'npressingthe spring close the valve 'l and open the valve 32. With the parts inthis position, the fuel flows from the float chamber through thepassages 9" and 9 to the chamber 10 and fills to the level of the fuelin the front chamber as indi-cated at A. When the throttle is open, thedifference in pressure above and below the throttle is very slight andconsequently the pressures above and below the piston 39 are slight.Under these conditions the spring &2 is of sufiicient strength to forcethe shoulder 38 downwardly and with it the stem 33, thus closing thevalve 32 and opening the valve 36. Under these conditions the fuel whichis accumulated in the chamber is swept through the extension 30 by wayof the passages 31 through the passages 34% and 43 to'the mixingchamber. As soon as the receptacle is emptied no further supply canreach the fuel chamber until the throttle is again closed so that afterthe discharge of the predetermined quantity which the re- 42 andpermitting the spring 35 to throttle valve devices ceptacle will take upthe normal functioning. of the rarbureter is not interfered with. Asshown the throttle is closed. It will be understood that the parts andengine are at rest. As soon as suction is applied above the throttle thepiston 39 Will be lifted.

What I claim as new is 1. In a carbureter, the combination of a mixingchamber; means for supplying air and the normal fuel to said chamber; athrottle valve; devices for augmenting the normal fuel supply after thethrottle is opened comprising a receptacle having a supply passageleading from a fuel supply and a discharge passage leading to the mixing chamber; valves for said passages; and

means sensitive to variations of pressure at the discharge side of thethrottle acting when the throttle is actuated for actuating said valvesalternately to close the supply passage and open the discharge passagewhen the throttle is opened and to close the discharge passage and openthe supply passage when the throttle is closed.

2. In a carbureter, the combination of a mining chamber; means forsupplying air and the normal fuel to said chamber; a throttle valve;tevices for augmentin the normal fuel supply after the throttle isopened comprising a receptacle having a supply passage leading from afuel supply and a discharge passage leading to the mixing chamber;valves for said passages; and a motor having one side subjected to pressure at the discharge side of the throttle and acting when the throttleis actuated to actuate saidvalves alternately to close the supplypassage and open the discharge passage when the throttle is opened andto close the discharge passage and open the supply passage when thethrottle is closed.

In a carbureter, the combination of a mixing'chamber; means forsupplying air and the normal fuel to said chamber; a for augmenting the1,aes,aso

normal fuel supply after the throttle is opened comprising a receptaclehaving a supply passage leading from a fuel supply and a dischargepassage leading to the mixing chamber; valves for said passages; a motorcomprising a cylinder having a connection with the mixing chamber atbothsides of the throttle; a piston in the cylinder; and a connectionbetween said motor and said valves whereby when the throttle actuatedthe valves are actuated alternately to close the supply passage and openthe discharge passage when the throttle is opened and to close thedischarge passage and open the supply passage when the throttle ,isclosed.

4. In a carbureter, mixing chamber; means for supplying air and thenormal fuel to said chamber; a throttle valve; devices for augmentingthe normal fuel supply after the throttle is opened comprising areceptacle having a supply passage leading from a fuel supply and adischarge passage leading to the mixing chamber; double valves havingoppos- .ing sides, one controlling the supply passage and the other thedischarge passage; a spring tending to close the valve controlling thedischarge passage; a spring tending to close the supplv passage andoperating against said first spring; a motor coinrism a cylindersubected to ressures at the opposite sides, of the throttle; a piston insaid cylinder operating against said valves in connection with saidsprings to open the valve controlling the discharge and close the valvecontrolling" the sunolv passage when the throttle is open and to openthe valve controlling the supply passage and close the valvecontrollino' the discharge when the throttle is closed.

In testimony whereof I have hereunto set my hand.

FREDERICK 6. BALL.

the combination of a

